Russian-readers will be richly rewarded, given that Dobzhansky modulates entries between Russian and English. In some entries, he self-consciously reflects on the language he opts to use. For example, on February 16, 1952, he imagines his child (Sophie) as the audience of his entries: "I am switching to English, in order that my child would find it easier to accompany her father's experiences, is she wants to accompany them."
 
Even in diaries recorded predominantly in Russian, Dobzhansky encloses numerous ephemera—business cards, letters, hand-drawn sketches, recognitions/awards, medical test results, newspaper clippings, and more—accessible to English-speakers. In many of his diaries from the 1950s and 1960s, typed letters provide some insights into his thoughts on health, mortality, and faith (e.g. 2/16/1952, 5/16/1957, 7/16/1968, 10/13/1969)
 
(strained) relations with his children (e.g. 5/16/1957, 10/28/1968, 12/31/1968)
 
and career (3/25/1970
 
6/30/1970, 1/25/1975).
 
Dobzhansky traveled widely, providing particularly detailed accounts of South America and the American West. While English entries largely abstains from discussing politics, he does occasionally discuss Brazilian politics (e.g. 9/7/1954, 10/16/1955), and the election of Richard Nixon, about whom he is consistently critical (e.g. 11/6/1970, 12/31/1973, 8/8/1974).
 
Throughout his four decades of journal-writing, Dobzhansky expresses one consistent concern: his desire to continue doing useful work. Marking his final birthday, he writes, "So, I have lived ¾ of a century. Today begins the last quarter, or rather past thereof…Oh God, give me power to finish my life serving you by doing my life work in science! In 75 years I have not yet exhausted either my interest or, I hope, my ability" (1/25/1975).

The Dobzhansky Papers feature 47 volumes spanning 1934-1975. (The boxes in which they are enclosed also include other notebooks and workbooks without sequential entries.) These diaries ought to interest researchers studying genetics and evolutionary biology, early-twentieth-century travel expeditions (particularly into the Amazon), the creationist debate (especially in textbooks and public schools), the post-war university (Columbia University, in particular), South American politics, and Dobzhansky's biography.
 
Russian-readers will be richly rewarded, given that Dobzhansky modulates entries between Russian and English. In some entries, he self-consciously reflects on the language he opts to use. For example, on February 16, 1952, he imagines his child (Sophie) as the audience of his entries: "I am switching to English, in order that my child would find it easier to accompany her father's experiences, is she wants to accompany them."
 
Even in diaries recorded predominantly in Russian, Dobzhansky encloses numerous ephemera—business cards, letters, hand-drawn sketches, recognitions/awards, medical test results, newspaper clippings, and more—accessible to English-speakers. In many of his diaries from the 1950s and 1960s, typed letters provide some insights into his thoughts on health, mortality, and faith (e.g. 2/16/1952, 5/16/1957, 7/16/1968, 10/13/1969)
 
(strained) relations with his children (e.g. 5/16/1957, 10/28/1968, 12/31/1968)
 
and career (3/25/1970
 
6/30/1970, 1/25/1975).
 
Dobzhansky traveled widely, providing particularly detailed accounts of South America and the American West. While English entries largely abstains from discussing politics, he does occasionally discuss Brazilian politics (e.g. 9/7/1954, 10/16/1955), and the election of Richard Nixon, about whom he is consistently critical (e.g. 11/6/1970, 12/31/1973, 8/8/1974).
 
Throughout his four decades of journal-writing, Dobzhansky expresses one consistent concern: his desire to continue doing useful work. Marking his final birthday, he writes, "So, I have lived ¾ of a century. Today begins the last quarter, or rather past thereof…Oh God, give me power to finish my life serving you by doing my life work in science! In 75 years I have not yet exhausted either my interest or, I hope, my ability" (1/25/1975).